$PRDO SEC Filings

10-K 10-K405 10-K/A 10-Q 10-Q/A 144 3 3/A 4 424A 424B4 425 4/A 5 8-A12G 8-K 8-K/A ARS CORRESP DEF 14A DEFA14A DEFC14A DEFN14A DEFS14A DFAN14A NO ACT NT 10-Q POS462B PRE 14A PREC14A PREN14A PRES14A PRRN14A S-1 S-1/A S-1MEF S-3 S-3/A S-4 S-4/A S-8 SC 13D SC 13D/A SC 13G SC 13G/A SCHEDULE 13G SCHEDULE 13G/A UPLOAD